[oi-dev] Strange libgmp effect

[Michael Schuster]

have you looked at compile-time vs run-time path setting for ld (eg
LD_LIBRARY_PATH, etc - I'm a little rusty in this respect, so please look
in the man-page)?

HTH
Michael


On Tue, Jun 18, 2013 at 10:45 PM, Alexander Pyhalov <alp at rsu.ru> wrote:

> Hello.
> While testing 3801 bug fix I observed one interestin unrelated GCC effect.
> We have two gmp libraries:
> one from library/gmp
>
> $ ls -l /usr/lib/libgmp.so*
> lrwxrwxrwx 1 root root     15 Jun 13 23:28 /usr/lib/libgmp.so ->
> libgmp.so.3.5.0
> lrwxrwxrwx 1 root root     15 Jun 13 23:28 /usr/lib/libgmp.so.3 ->
> libgmp.so.3.5.0
> -rwxr-xr-x 1 root bin  294528 Jun 13 23:28 /usr/lib/libgmp.so.3.5.0
>
> and another coming with gcc
> $ ls -l  /usr/gcc/4.7/lib/libgmp.so*
> lrwxrwxrwx 1 root root     16 Jun 13 23:39 /usr/gcc/4.7/lib/libgmp.so ->
> libgmp.so.10.0.5
> lrwxrwxrwx 1 root root     16 Jun 13 23:39 /usr/gcc/4.7/lib/libgmp.so.10
> -> libgmp.so.10.0.5
> -r-xr-xr-x 1 root bin  577620 Jun 13 23:39 /usr/gcc/4.7/lib/libgmp.so.10.*
> *0.5
>
> Now, when autoconf tries to find libgmp it tries to compile the next
> program:
> /* confdefs.h */
> #define PACKAGE_NAME "FULL-PACKAGE-NAME"
> #define PACKAGE_TARNAME "full-package-name"
> #define PACKAGE_VERSION "VERSION"
> #define PACKAGE_STRING "FULL-PACKAGE-NAME VERSION"
> #define PACKAGE_BUGREPORT "BUG-REPORT-ADDRESS"
> #define PACKAGE_URL ""
> #define HAVE_LIBGMP 1
> #define HAVE_DECL_MPZ_POWM 1
> #define HAVE_DECL_MPZ_POWM_SEC 1
> /* end confdefs.h.  */
> #include <ctype.h>
> #include <stdlib.h>
> #if ((' ' & 0x0FF) == 0x020)
> # define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
> # define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
> #else
> # define ISLOWER(c)              (('a' <= (c) && (c) <= 'i')
> || ('j' <= (c) && (c) <= 'r')                   || ('s' <= (c) && (c) <=
> 'z'))
> # define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c))
> #endif
>
> #define XOR(e, f) (((e) && !(f)) || (!(e) && (f)))
> int
> main ()
> {
> int i;
> for (i = 0; i < 256; i++)
> if (XOR (islower (i), ISLOWER (i))
> || toupper (i) != TOUPPER (i))
> return 2;
> return 0;
> }
>
> with: gcc -o gmp gmp.c -O2 -lgmp
> The command finishes succesfully but links gmp to libgmp.so.10:
> $ ldd gmp
> libgmp.so.10 =>  (file not found)
> libc.so.1 =>     /lib/libc.so.1
> libm.so.2 =>     /lib/libm.so.2
> So, the resulting binary cannot be run.
>
> So, I have an ethernal question: who is guilty and what to do?
>
> --
> System Administrator of Southern Federal University Computer Center
>
>
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>



-- 
Michael Schuster
http://recursiveramblings.wordpress.com/
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